public class Example3_7 {
    public static void main (String args[]) {
        int sum=0,i,j;
        for(i=1;i<10;i++){
            if(i%2==0){
                continue;
            }
            sum=sum+i;
        }
        System.out.println("sum="+sum);
        for(j=2;j<100;j++){
            for(i=2;i<=j/2;i++){
                if(j%i==0)
                    break;
            }
            if(i>j/2){
                System.out.println(""+j+"是素数");
            }
        }
    }
}
